That's correct, it is not a requirement, it is recommended. Sounds like in the long run, it may make it easy for me to obtain authorization to fly in controlled airspace, not to mention I am all the way inn when it comes to safety. I want everybody, on the ground and in the air, to be safe. If there is a helicopter heading in the direction where operations are going to take place I want to know about it, to take appropriate action manned aircraft have the right of way.
I decided to go with the Yaesu FTA-750L from Gulf Coast Aviation, as you mentioned it is $359.00 shipped. Additionally, for limited time until July 31, 2017, there is a $30 rebate for the 2017 Airshow. Brings the total cost of the unit down to $329. Again, safety is priceless to me.